Home About Browse Search

Nordin , Linnea, 2011. Produktivitet och lönsamhet vid skogsbränsleuttag i klena gallringar : en tidsstudie av Vimek 608 BioCombi i contortabestånd . Second cycle, A1E. Umeå: SLU, Dept. of Forest Resource Management



The annual demands for forest fuels increases in Sweden. At present, large unutilized biomass resources is found in young, dense forests from which about five million oven-dry tonnes (ODt) (23 TWh) could annually be extracted as forest fuel. But harvesting small trees give high logging costs and new cost-efficient harvesting techniques are therefore required.

The aim was to study the productivity of Vimek 608 BioCombi in forest fuel thinning of Lodgepole pine and to calculate the economy of the harvesting and estimate the thinning quality. The time study was performed in Åmarken in the county of Västerbotten. The study area had 4724 trees/ha with an average tree volume of 26.6 dm3 (on bark).

On average, 15.3 ODt/ha and 1614 trees/ha was harvested. The thinning intensity of the initial basal area was 34%, and 12% of the remaining trees had stem damages. At 100 m forwarding distance the hourly effective work time (E0-hour) consumption per ha was 17.6 giving a productivity of 0.88 ODt/E0-hour. The productivity was influenced by forwarding distance, the harvested biomass/ha, tree volume and the proportion of Lodgepole pine of harvested biomass. At machine cost of 550 SEK/E0-hour, a forest fuel prize of 210 SEK/m3solid, a forwarding distance of 100 m, a productivity of 0.88 ODt/E0-hour and harvested tree size of 19 dm3solid the profitability was -1 633 SEK/ha. The BioCombi is a relative new machine on the market and development of both technology and work methods are possible to increase efficiency, and thus reduce logging costs.

Main title:Produktivitet och lönsamhet vid skogsbränsleuttag i klena gallringar
Subtitle:en tidsstudie av Vimek 608 BioCombi i contortabestånd
Authors:Nordin , Linnea
Supervisor:Bergström, Dan
Examiner:Nordfejll, Tomas
Series:Arbetsrapport / Sveriges lantbruksuniversitet, Institutionen för skoglig resurshushållning och geomatik
Volume/Sequential designation:315
Year of Publication:2011
Level and depth descriptor:Second cycle, A1E
Student's programme affiliation:SY001 Forest Science - Master's Programme 300 HEC
Supervising department:(S) > Dept. of Forest Resource Management
Keywords:Drivare, kombinerad, skördare-skotare, prestation, helträdsuttag, röjning
Permanent URL:
Subject. Use of subject categories until 2023-04-30.:Forestry - General aspects
Forestry production
Forest engineering
Deposited On:15 Apr 2011 08:07
Metadata Last Modified:20 Apr 2012 14:18

Repository Staff Only: item control page